Hydrophone
A hydrophone is a vital part of a gear monitoring system. The hydrophone receives the acoustic communications from the gear sensors and converts these to electrical signals.
Two hull mounted hydrophones are available, one for purse seining operations, and one for trawl operations. You can install both, and then select active hydrophone by means of a selector box on the bulkhead. You can also select the active hydrophones by means of dedicated dialog boxes in the TV80.
Purse seine hydrophone
The hull mounted hydrophone for purse seining operations has a 90 degrees horizontal beam and a 30 degrees vertical beam to provide the system with optimal reception from the sensors on a purse seine. This specific beam pattern is especially suited for purse seining.
Trawl hydrophone
The trawl hydrophone offers a 50 degrees horizontal beam and a 30 degrees vertical beam. This provides optimal reception from sensors on a bottom or pelagic trawl. This specific beam pattern is especially suited for trawling.
Portable hydrophone
A portable hydrophone is also available. It is designed as a temporary solution until a fixed hydrophone can be installed at the vessel’s next planned dry docking. It has an omnidirectional beam and a 50 meter integrated cable.
The cable is supplied on a reel for convenient retrieval and stowage, and is equipped with a plug for easy attachment to the Sensor Receiver. The cable is sheathed in polyurethane providing robust external protection to compliment its 150 kg tensile strength.
ITI hydrophone
The ITI hydrophone offers a dual or triple split-beam configuration. It has a 40 degress circular beam width and a 70 to 100 degrees horizontal coverage depending on the arrangement.
Together with the TP90 transceiver and the PxPos sensors, the hydrophone allows you to receive trawl positioning information.